497565557 has 4 divisors (see below), whose sum is σ = 514723020. Its totient is φ = 480408096.

The previous prime is 497565539. The next prime is 497565569. The reversal of 497565557 is 755565794.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 262893796 + 234671761 = 16214^2 + 15319^2 .

It is a cyclic number.

It is not a de Polignac number, because 497565557 - 2⁶ = 497565493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 497565499 and 497565508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497565527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8578688 + ... + 8578745.

It is an arithmetic number, because the mean of its divisors is an integer number (128680755).

Almost surely, 2^497565557 is an apocalyptic number.

It is an amenable number.

497565557 is a deficient number, since it is larger than the sum of its proper divisors (17157463).

497565557 is a wasteful number, since it uses less digits than its factorization.

497565557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17157462.

The product of its digits is 6615000, while the sum is 53.

The square root of 497565557 is about 22306.1775524181. The cubic root of 497565557 is about 792.4102839060.

The spelling of 497565557 in words is "four hundred ninety-seven million, five hundred sixty-five thousand, five hundred fifty-seven".